/**
 * Copyright (c) 2010 by Kevin Bierhoff.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *    1. Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *    2. Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *    3. Neither the names of the authors nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.googlecode.syper.javasyp.classpath;

import java.io.File;
import java.io.IOException;
import java.net.URL;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jdt.core.ClasspathContainerInitializer;
import org.eclipse.jdt.core.IAccessRule;
import org.eclipse.jdt.core.IClasspathAttribute;
import org.eclipse.jdt.core.IClasspathContainer;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.osgi.framework.Bundle;

import com.googlecode.syper.javasyp.Activator;

/**
 * @author kevin
 *
 */
public class SypClasspathInitializer extends ClasspathContainerInitializer {

	@Override
	public void initialize(IPath containerPath, IJavaProject project)
			throws CoreException {
		IClasspathEntry annoJar = getAnnoJarClasspathEntry();
		
		SypClasspathContainer container = new SypClasspathContainer(containerPath, annoJar);
		JavaCore.setClasspathContainer(containerPath, 
				new IJavaProject[] { project }, 
				new IClasspathContainer[] { container }, 
				null /* no monitor */);
	}

	private static IPath getBundleLocation(Bundle b) {
		URL local = null;
		
		try {
			local = FileLocator.toFileURL(b.getEntry("/"));
		} catch (IOException e) {
			e.printStackTrace();
			return null;
		}
		String fullPath = new File(local.getPath()).getAbsolutePath();
		return Path.fromOSString(fullPath);
	}
	
	public static IClasspathEntry getAnnoJarClasspathEntry() {
		Bundle bundle = Platform.getBundle(Activator.PLUGIN_ID);
		IPath bundlePath = getBundleLocation(bundle);
		
		IPath jarPath = bundlePath.append("syp-annos.jar");
		
		return JavaCore.newLibraryEntry(
				jarPath, 
				jarPath /* source is in the jar file */, 
				null /* auto-detect source root path */,
				new IAccessRule[0], 
				new IClasspathAttribute[0], 
				false /* not exported */);
	}
}
